* Imported tmpfs (efficient memory filesystem) from NetBSD.
* Added support for minidumps.
* Added swapcache support.
+* Ported POSIX Message Queues from NetBSD (Google of Summer Project).
> ### HAMMER changes
* Updated to HAMMER version 4, moving snapshot settings out of config files and moving snapshots to /var/hammer; add an UNDO and REDO FIFO to improve fsync performance.
* Imported the alc(4) driver for Atheros AR8131/AR8132 NICs
> ### Userland changes
+* Ported many complex arithmetic functions from NetBSD and FreeBSD.
> ### amd64 related changes